Cap for a security key



FIG. 1 is a drawing showing a side view of the cap for a security key of the new design;

FIG. 2 is a drawing showing another side view of the design shown in FIG. 1;

FIG. 3 is a drawing showing a top view of the design shown in FIG. 1;

FIG. 4 is a drawing showing a further side view of the design shown in FIG. 1;

FIG. 5 is a drawing showing another side view from the design shown in FIG. 1; and,

FIG. 6 is a drawing showing a bottom view from the design shown in FIG. 1. 

The ornamental design for a cap for a security key, as shown and described. 